Area-measuring machine



H. THUN.

AREA MEASURING MACHINE. APPLICATION FILED 0501,1920;

1,412,095. Patented Apr. 1 1922 2 SHEETS-SHEET L.

H. THUN.

AREA MEASURING MACHINE.

y APPLICATION r1150 050.7.1920. 1,412,095. Patented Apr. 11, 1922.

2 SHEETS-SHEET 2- rarest em Enema-1m THUN, or nssEiv-on-rHE-RUHR, GERMANY, AssIeNoa To FRIED. KRUrr AKTIENGESELLSCHAFT, 0F ESSENO1\T-THE RUHR, GERMANY.

AREA-MEASURING MACHINE.

' Specification of Letters Patent; Patented Apr, 11,1922;

. Application filed December 7, 1920. Serial No." 429,025.

To all whom it may concem Be it known that I, HnnMANN THUN, residing at Essen-on-the-Ruhr, Germany, a citizen of the German Republic, have invented a certain new and useful Improvement in an AreaJVIeasuring Machine, (for 'which I have ,applied for a patent in'Germany September 4 19 19,)

ofwhich the following is a specifioation.

pThe invention relates toarea measuring .machines particula-rly those intended for the measurement of leather, in which partswhich can be raised from a support beneath, put into of Fig. I partly" in 1 Fig. 4 a-view corresponding to Fig. 2'0n a larger scale.

A drivingroller B rotarily mounted on the frame Aof the leather measuring machine, is connected through a pinion gearing b ,,C, 0 with a; toothed wheel D loosely rotatable onja shaft (Z The pinions O c are; moimtedon a loosely rotatable hollow shaft 0 (Figs. 2- and 4) whichcarriesa further toothed; wheel 6 The toothed wheel 0 is positively connected by a sprocket chain 0 (Figl) with a toothed wheel E likewise mounted loosely rotatable on thesha'ft (Z Between the toothed wheels D and E Ia toothed coupling Fcanslide on theshaft (Z by means. of a leverf and rotate with.

this shaft. The objectof thetoothed couplin'g F is to couple up e'ither the toothed wheel D' orgE with; the shaft d and the gearing formed by the parts 12 O;0 D; c 0* E F (Z ;therefore represents a change speed and reversing gear. .On thejshaft (Z there are mounted at equal distances and loosely rotatable, a nu'mber of discs G every two of which are-by means of a band g connected with a measuring agency (not shown) of an indicator device containmg a scale disc, in such manner that a rotation of one of the discs G in the direction of'the arrow (Fig. 1) produces a rotation in the like direction of the scale disc. Thescale disc is in its. zero positionwhenthe several parts are-in thepositionshown by Fig. 1. On theband g a weight likewise notshown in the directionof the arrow y. Each disc .G is rigidly connected with the. ratchet wheel G which iscoupled by a friction .and acting on the scale disc, exerts a-pull.

clutch with the. shaft 01 The friction clutch is made up of two" annular surfaces 9 and (Z (Figs. 2 and 4) lying against each other under the action of a plate spring H, one'of which, 9 is on the ratchet wheel.

G and theother, d3, on acouplingloox' d? which is fixedly keyed -on--the'- shaft 03 Each ratchet wheel Grcarries a ping 'wh-ich 1 lies against a stop a mountedson the frame A. Into the teeth of each ratchet wheelG :thereengages a ratchet J mounted onthe frame A and beingrunder the actionof a spring. 6 which. ratchet is capable of. pre{ venting a rotation of the ratchet wheel in the direction of the. arrowm. ,Against the ratchet-J there lies'in' the manner par? 'ticularly seen from Fig. 1, a set screw 70?,

which is carried by the one arm K 0f a crank lever K K pivotally mounted on the frame A. I At the endof theother arm, K,.

a pressure roller -70 constituting a part which oan'be lifted up, is mounted andfl-i'es on the driving roller Seen in the ,di-

rection of the arrow as (Figg' l) there lie onthe driving rollerB infront of the pressure-rollers 70 a number ofepressurfe rollers m whioh are loosely rotatable in groups of five (see particularly'Fig. 2) on short shaft m (Fig.1). With the ends of-the shafts MP, the arms M of crank levers M1 M 3 enga 'e, v 7 at i thefends of hollow shafts m ,'W l11Cl1 are pivotally mounted bymeans of 'a continuous shaft R, on lugs a of theiframe A. The

The cranklevers :M M are mounted i arms M of the 'cranklevers are under the-action of springs m (Figs. 1 and5),

which press the rollers m against the drivshaft B. The

rollers m of 'eachgroup are separated from each other byfgroovesm (Fig.2). The

individual pressure pressure rollers m areintendedto lieabove f on the; piece of'leather which approaches on a guidetable A of the drivins'roller B. I I

and to press the leather against the driving circle.

through the two.

of leather.

roller 13. To the under part of the arm M there is screwed a guide plate N, extending over the width of one group each time, and having its free end somewhat lifted which serves to press down a piece of leather, P, the front end of which sometimes stands slightly away from the guide table A and to guide it with certainty below the pressure rollers m Towards the pressure rollers m the guide plate N has on the side prongs a like a comb, which pass through the-grooves m at intervals between the individual pressure rollers m and in the manner appearing from Fig. l and are curved essentially in the form of an arc of a On the driving roller 13 there are provided at equal distances, grooves Z2 into which strippinepfl prongs a project, the object of which is to strip off from the driving roller B the piece of leather moving between the latter and the pressure rollers 70 and to guide it on to a delivery table A For the purpose of describing the mode of operation let it be assumed that the parts are in the position shown on the-drawing, in which the indicator device (not shown) is in the zero position and any rotation of the ratchet wheels G under the action of the pull in the direction of the arrow 1] is prevented by thepins lying against the stops a If the area of the piece of leather P is to be measured, the roller B is first of all set rotating in the direction of the arrow .2

(Fig. 1). In this rotation, the pressure rollers and 71: lying on the driving roller B are likewise rotated by friction.

. thermore by means of the gearing b C 0 D F, in the position-shown 1n the drawing'of the lever 7, the shaft (Z is rotated in the direction of the arrow :0. At first however the discs G do not partake of this rotation of the shaft al because the ratchet wheels G rigidly connected with them, are held by the ratchets J in their original angular position. Thereupon the piece of leather P is passed onto the guide table A on the driving roller 3 and if its forward part stands up from the table A it is pressed down by the guide plate N. As soon as the piece of leather P comes into contact with the driving roller B and the pressure rollers m it is carried along-by the latter by friction and passed The pressure rollers m which press on the leather piece P under the action of the spring at smooth out the piece The leather P is kept in this flattened out position by the prongs n during its further passage. The measuring process proper is then initiated at the moment at which the piece of leather P, moving over the driving roller B, reaches the pressure rollers k and lifts the latter off the driving roller 13. On the lifting of any of the pres sure rollers k the corresponding set screw Z0 forces the ratchet J out of the corresponding tooth gap, the ratchet wheel G is released and is now driven, through the friction clutch d g by the shaft d in the direction' of the arrow 00, the stop pin 9* receding from the stop (L The rotation of the ratchet wheel G is transmitted through the band 9 to the scale disc of the indicator device which now rotates continuously inthe direction of the arrow w in proportion to the area of the leather piece passing, through. 75 The leather piece P, pressed against the 7 driving roller B by the pressure of the rollers m and 70 after it has appeared from beneath the pressure roller 76?, is stripped off the roller B by the stripping-0E prongs a and guided over on to the delivery table A. At the conclusion of the measuring process, the end of the leather piece P glides out from beneath the roller 7: and the latter, under the pressure of the spring i again comes to lie on the driving roller B. 'The ratchet J therefore comes into engagement with the ratchet wheel G so that the latter, and with it the band 9 operating the scale disc of the indicator device, are stopped from further movement. The measuring process is now at an end. 7

If the parts of the machine are now'tobe brought back into the position shown on the.

drawing, the lever f and with it the coupling9 5 box F are put back into the position in which the gear wheel E is coupled with the shaft (Z The shaft al now rotates (as can straightway be seen from Fig. 1), in the opposite direction to the arrow :12. This rotation is shared bythe ratchet wheel G and disc G, connected with the shaft al by the friction clutch (Z g ,-as' the ratchet J which only stops movement in one direction, forms no hindrance to a rotation of the ratchet wheel G in the direction in question. The scale disc of the indicator device meantime under the action of the weight attacking it, likewise rotates in anopposite direction to the arrow :0, the band g moving in the direction of the arrow y. As soon as the pin 9 strikes against the stop a the corresponding ratchet wheel G is prevented from further rotating. The arrangement, as mentioned, is so designed that at the moment at which all pins lie against the corresponding stops (t the scale disc of the indicator device once more resumes its zero position. The machine is then straightway ready. for r the next measurement. a

Owing to the fact that theparts k which can be lifted off the" driving roller B are not themselves designed as measuring agencies, but only serve by being lifted up to couple the shaft 05 constantly and positively linked up to the driving shaft B, with the driving agencies G of the adding mechanism, the essential advantage is secured of an exceedingly great simplification and cheapening of the entire gear requisite for operating the adding mechanism. It is no longer necessary in the subject matter of the :present invention to insert a bulky pinion geari'n between each part which can be lifted (7'4?) and the corresponding driving disc (G) v of the adding mechanism; on the contrary is only brought aboutjeach time directly be-' for the entire area measuring machine a single gearof this kind serves. Owing to the permanent connection of the driving roller 13' with the shaft al intended for rotating the driving agencies of the adding machine,

however there isfurther secured a considerably improved. mode of operation thanis shown by leather measuring machines in which the positive connection in question fore the beginning ofthe measuring process proper, by the lifting off of apressure roller. It is clear indeed that with leather measuring machines'of-the kind last mentioned, the

least accurate meshing of teeth, and consequently rapid wear of'lthe teeth takes place, while-with the present invention, accuracy of mesh is permanentlyguaranteed.

A further advantage of the present invention lies in the fact, that when the machine is put back into the zeroposition under the action of the powerlattacking the band 9?,-

no undesirably rapid inovement ending in a jerk can take place on the gearing parts.

On the contrary the return takes place at a speed which can be determinedbefore-hand and without a jerk or shock. V

Claims.

1. An area measuring machine for use in connection with an'indicating device comprising a driving .roller, a driving shaft, means connecting said roller to said shaft, means functioning proportionally to said driving roller for operating the indicating device, means for preventing an operation of said indicator operating means and means operatable by the material to be measured for rendering means inactive.

7 2. An area measuringmachine for use said operation preventing in connection with an indicating device comprising a drivingrollema driving shaft con nected thereto, feelers bearing upon said driving roller, the material to be measured being. fed through said machine between said driving roller and said feelers, indicator operating means functioning proportionally to said driving roller, means normally preventing an operation of said indicator operating means and means 'operatable by said feelers, when the material to be measured is passed through the machine, for rendering said operation preventing means in-" active. c g e 3. An area measuring machine adapted for the measurement of leather comprising a driving roller, a shaft for said roller, feelers bearing upon said driving roller, the material to be measured being fed through said machine between said driving roller and said feelers, a second rotatables'haft,

means on said second shaft for operating an indicator device, means preventing an operation of said'indicator operating means, means operated by said feelers for rendering said operation preventing means inactive.

and a reversing gear interposed between the driving roller shaft and saidsecond shaft and operatively connecting the same.

l. An area measuring'machine of the class describedcomprisinga drivingroller, feelgaging said ratchet gears to prevent rotation of said drivingmembers in one direction and means connected to and operatedby said feelers for releasing said ratchet gears to permit the driving members to function 7 when the piece of material to bef neasured lfspassing-through'the'machine." I 5. An area measuring machine of the class sets of cooperating pressure rollers, means described comprising a driving roller, two

supporting each set of pressure rollers I whereby they are'resiliently pressed toward] said driving roller, said driving roller, and

said pressure rollerscooperating to feedthe material to be measured through the ma: chine, a rotatable shaft, driving means on said shaft for operating an indicating device, clutch members associated with said drivingmeans for coupling the same to said shaft, ratchet wheels associated witheach of said clutch members, pawls engaging: said ratchet wheels, the mounting, means of -.one set ofsa1d pressure rollers comprising arms supporting a roller of saidset'of pressure rollers, theother arm of said double crank arm operatively engaging said pawl whereby when material .to be measured is fed through said machine, said second set of pressure rollers will bemoved away from said driving roller and said pawls disengaged from the ratchet wheels, thus permitting said driving means to function. g

6. An area measuringmachine of the class described compris ng a driving roller rotat 'v double crank arms one of eachof said crank 1 ably mounted, two'sets of pressure rollers,

said pressure rollers anddriving roller cooperating to feed the'material to be meas# ured through said machine, a rotatable shaft, driving discs upon said shaft operatively connected to an indicating device, friction clutch members, one .part of each clutch'being, associated with a driving disc &

and the other secured to said shaft, ratchet wheels rigidly secured to each of said driving discs, pawls for engagement with said ratchet wheels, means operated by one set of said pressurerollers "for releasing said pawls to permit said shaft to rotate said driving discs, a guide plate associated with one set of pressure rollers, said guide plate being disposed'and shaped so as to direct the material to be measured between said roller and pressure rollers.

7 An area measuring machine adapted for the measuring of leather comprising a driving roller, a shaft rotatably supporting said driving roller, two sets of pressure rollers, said pressure rollers and driving roller cooperating to feed the material to be measured through said machine, a second shaft, driving discs loosely mounted upon said second shaft for operating an indicating device, clutches associated with each driving disc and said shaft for coupling said driving discs to said shaft, a pawl and ratchet mechanism associated with each clutch for controlling its operation, means operatively connecting one set of pressure rollers to said pawl and ratchet mechanisms whereby said pawl and ratchet mechanisms may be r disengaged to permit said clutches to tunetion, guide plates associated with the other set of pressure rollers, said guide plates ex tending between said sets of pressure rollers and said driving roller and being shaped so as to direct the leather to be measured there- 3 r between and prongs formed on said guide plates extending in a longitudinal line beof, pressure rollers for causing said driving discs to function,areceivingtable disposed rearivardly of said driving roller, said driving roller being provided withcircumferential grooves and stripping prongs secured to said table with theirfree ends disposed in said grooves whereby the material to be measured will be stripped from said driving roller and put upon said receiving table.

The foregoing specification signed at Essen, Germany, this 26th day of July, 1920.

a HERMANN THUN.

In presence of-V a v e HANs GOTTSMANN,

J OHANN Dnomms. 

